ISO 16770:2019 塑料 聚乙烯环境应力开裂（ESC）的测定 全缺口蠕变试验（FNCT）

标准编号：ISO 16770:2019

中文名称：塑料 聚乙烯环境应力开裂（ESC）的测定 全缺口蠕变试验（FNCT）

英文名称：Plastics — Determination of environmental stress cracking (ESC) of polyethylene — Full-notch creep test (FNCT)

发布日期：2019-09

标准范围

本文件规定了在规定的试验环境中测定聚乙烯（PE）材料抗环境应力开裂（ESC）能力的方法。该试验在从模制板/试样或成品加工而成的缺口试样上进行。将试样浸入规定温度下的表面活性剂溶液等环境中时，试样承受静态拉伸载荷。失败的时间是经过测量的。该方法专门针对聚乙烯材料开发，但可用于评估聚乙烯产品，如管道、熔焊/配件和吹塑聚乙烯容器，以研究侵蚀性环境的影响，即危险品和化学品。该方法适用于按选定尺寸模制的试样，或由压缩模制板材或注射模制试样或成品（如模制件和管道）加工而成的试样。当用挤压或模制零件加工试样时，结果不仅受材料性能的影响，还受加工过程中引入的应力或方向的影响。

This document specifies a method for determining the environmental stress cracking (ESC) resistance of polyethylene (PE) materials in a defined test environment. The test is carried out on notched test specimens machined from moulded sheets/specimens or from finished products. The test specimen is subjected to a static tensile load when immersed into an environment such as a surfactant solution held at a specified temperature. The time to failure is measured.The method has been specifically developed for polyethylene materials but can be used to evaluate PE products, such as pipes, fusion welds/fittings and blow-moulded PE containers to study the effect of aggressive environments, i.e. dangerous goods and chemicals.The method is suitable for use with test specimens moulded to chosen dimensions or machined from compression moulded sheets or injection moulded specimens, or from finished products, such as mouldings and pipes. When the test specimens are machined from extruded or moulded parts, the results can be affected not only by properties of the material, but also by stresses or orientation introduced during processing.

标准预览图